Pin



July 6 1926. 1,591,404

H. K. SAKOWSKI PIN Filed April 8. 1926 FIGJ.

5 FlG.2..' @4 W 9 I gww-ntoz H070 Karl Ja/(owaki 2Q prising ahead and a single shank; infsuchav -manner that the frictional surface effect thereof will be greatly increased, and IatvPatented July 6,1926

1 11.591.404- ATE T-[j OFFICE;

HUGO KARL saxowsxrgorjivnwyorek,

"-n pneation filed April s, 1926, Serial No. 100,670 ,and in. German May is; 1925.

This invention relates to pinseand its. object is to providecertain;.improvements of construction which impartto the pin the"? advantages both" of an ordinary pin, such aslsmallness lightness, cheapness and ready applicability for various purposes and of a so-called safetyv pin, such asreliability. and absence of'ri skof accidentsiso that my improved'pin will be useful for domesticpu-rposes as well as in the ofiice, shop' and factor'yline; i

'Ordinal'fly straight, and smooth pins in I I general useffor joiningltogether. 'cloth,

letters, documents andthe like are' objectionable. since'they frequently'detach from the material and get lost and give rise to injuries.- I. I.

My invention aims to remedy this defeet, by constructing acne-piece pin comftain'this object bygiving the-shank aparperipheral points of the convolutions of the ticular shapes 7 e In the accompanying drawings forming a part of this specification I have shown,"by way f exemplification, tWO jembodnnents of'my invention. I. l TIn said drawings, i

' ,Figure .1 is an elevation. of oneform of the improved pin; 1 e i r p Fig. 2 is a section taken: on the line III1 of Fig.1;

Fig. 3 is a 'vi w similar tolFigjl bee;

showing a modification;

Fig. 4: is .a section .IVIV of Fig.3.

Referring to Fig. 1, the shank. of the 1pm comprises three distinct portions or sec-;

tions 4, 5 and 6. The upper or top section et is straight, and its outer end is shaped to form a head 3. v The lower pointed section 6 is l likewise straight. mediate section 5 is coiled or twisted to form convolutions of decreasing diameter I extending from the top "section 4 to'the point sectionfi', so that the contour or shank lie in the surface of a cone, the base of which is near the top section 4: of the pin, as willbereadily understood on an inspection of Fig. l."

It will be seen thatthe wider convolutions nearthe top or'head section 4: of the pin" serve as a locking means tohold thepin firmly in the paper or cloth, the mo're so taken 'on the: line The short inter section 5 comprising theisaid wider con- 'volutions passes only for a. short length through the pierced paper or cloth; while the lower portion of the said'intermediate section 5,.owing to its comprising'thezcontermediate section '5 is" -mainly 'a locking .means and thelower portion-of the section 5 is mainly a guiding element.

" Referring tothe modification illustratedin Fig. 3, the shank of the pin likewise consists of' three sections 4-, 5 and 6, and-theend sections-4" and 6 are straight and relatively "long, just asin the embodiment depicted in Fig. 1. Butthe short intermediatesection 5; is not coiled ortwisted as will be clearly understoodffrom Fig. 4. I The section is bent in a commonv plane over the whole of its lengthin a wave-like manner with the single bends or waves decreasing in width or height from the; top section 4; towards the pointed section 6 so. that ;.the crests or ridges; ofthe'severalwaves will lie in the surfacev of acoiie' the base; of which is near the, headend of the pin, just as in the em- "bodimen't'show'nin Fig.1. For this reason? .also the .wider upper bends or waves n a the to'p1section 1"in Figq3serve mainly as, a

locking means,

while 1 the i smaller since theupper portion ofthe intermediate narrower "lower bends or waves i near the point-end section 6- are chiefly 'a guidingf element, as described 'hereinbefo'rewith ref- 7 erence to Fig. 1. I

Referring to Figs. 3 and 4, the ni'unerals '8 and Qindicate'the extreme points of the crests of the waves contiguous to the head.

portion 8, it is tobe seen therefrom that the undul'atory bend or heightof the first wave is somewhat greater than, or in eX- andthat the extreme points'goir crests of the'several waves liein the s'urfaceof a cone owing to the progressively and gradu cess of, that of the second wave, and so on, e

ally decreasing height of the waves on both sides of the axis .of the shank.

In accordance with the various purposes for whichthe pin may be used, it can be made as desired or required: e 1. With a different number: of convolufend-section towards the point-end section, so 7 p its scope as defined 1n the appended 'clalms;

' shorter or longer straightlower 2; With convolutions,' aves or windings having different forms, heights, depths,di ameters and lengths;

3. VVithshorter or longer 'straiglittop head-end sections 4 or l as Well as with or point-end sections 6 and 6; j

And With a shank which is round, oval, flat, square or otherwise tion; w r o r 5. With a head having different forms, shapes andsizes. I 1

In :all' cases, however, the "convolutions, waves or windingsdecrease from the headf' that the perip eral'orcontour points, or the crests of the ridges of the Waves, lie in the snrfaceofacone. I r The principal effects the described pin are as follows:

i The shank'of the spin is formedto provide maximum frictional surface effect near the top or head-end section and ininiinnni frictional surface efiect near the point-end section.

When inserting the pin into a ace-of nieterial and consequently moving-it in th e direction of its point-end,' the frictional surface effect it at first Very slight and increases gradually towards the end of tlie operation, so that the pinr'ea'dily advances into the piercedmaterial W-hene slight pressnre is 'eXertedon-its head, and finally g'ets'a firm hold in thematerial owing to the maximum locking orret'aining-efiect of; the d eep Wind- ;ings nearfthe head end {of the pin; i

Then m ving-M116 pin from the material the" d rection shaped in cross-sec- Caccordance-With the particular use of the;

and advantages of comesinto full effect at the be inning-0f the effort at operation, sothat a certain pinh the head end is requlred to remove the pin "from thematerial. The pin is thus prevent- "ed fromheceming loose or detached accidentally. I V p p V In reducing my invention to practice, I find that the forms shown; herein are the most practical and preferred embodiments of Which I amnow awfare hiitrealizingithat certain conditions will necessarily 'vary in pin, I desire to emphasize the factthat various minor changesfin the construction and shape may be resorted to W-hei'i-required,

without sacrificing any of the advantages of inyinventi-on and Without d'eparting from What I claim i-s:. a

V 1. Alone-piece pin, coinprisinge l'ie a'd and a shank, embodying a relatively-long,

U straight point-end section, and relativelys raighthead endsection, a relatively-long.

stra-i 'ht J-head-end' section, a relatively-long,

D straight point-end sect-ion, and relativelyshort, intermediate section which is" shaped to form a longitudinal series of curved por ti'ons gradually decreasing; in size from the head end towards the-:poi nt end; said curved portions extending over the Whole length- 0f said intermediate section so tha-t'theirbcontour or peripheral points lie the surface of a cone the base of Which is end of the pin. 7 w c. 7

testimony whereof I'afiiX my signature.

7 HUGO KARL SAKOWSKI;

near the "head 

